5-Methyl-3-(1-methyl-1H-pyrazol-3-yl)isoxazole CAS 1824596-58-8
| CAS No. | 1824596-58-8 |
| Molecular Formula | C8H9N3O |
| Molecular Weight | 163.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methyl-3-(1-methyl-1H-pyrazol-3-yl)isoxazole (CAS 1824596-58-8), molecular formula C8H9N3O and molecular weight 163.18 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5-Methyl-3-(1-methyl-1H-pyrazol-3-yl)isoxazole (C8H9N3O) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 5-Methyl-3-(1-methyl-1H-pyrazol-3-yl)isoxazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C8H9N3O |
| Molecular Weight | 163.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 3 |
Recommended Standards
- 2-Methoxy-4,6-dimethylpyrimidine-5-carbonitrile (CAS 1823882-20-7)
- 2-azido-1-phenylethan-1-ol (CAS 18756-01-9)
- 2,3-Dimethylpyrazolo[1,5-a]pyrimidin-7(1H)-one (CAS 1822715-83-2)
- 5-Methoxy-2-methylpyrazolo[1,5-a]pyrimidine (CAS 189116-37-8)
- 5-Bromo-2-iodo-1H-pyrrolo[2,3-b]pyridine (CAS 1261365-56-3)
- 5'-Adenylic acid, anhydride with P,P'-(difluoromethylene)bis[phosphonic acid] (CAS 81336-78-9)
- N-(9-((2R,4S,5R)-4-Hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-8-oxo-8,9-dihydro-7H-purin-6-yl)acetamide (CAS 138937-90-3)
- 4-(2,2-Difluoro-ethylamino)-piperidine-1-carboxylic acid tert-butyl ester (CAS 1010422-66-8)
- N-(3-Amino-2-methylphenyl)-4-ethoxybenzamide (CAS 1016764-79-6)
- 1-((4-Chloro-1H-pyrazol-1-yl)methyl)-3,5-dimethyl-1H-pyrazol-4-amine (CAS 1006473-09-1)
- 5-Chloro-6-oxo-1,6-dihydropyridine-2-carbonitrile (CAS 1784430-76-7)
- Ozenoxacin Impurity 33 (CAS CATO-C4X-279633)
- 4-Fluoro-D-phenylalanine (CAS 18125-46-7)
- Q-Peptide trifluoroacetate salt (CAS 1361235-89-3)
Why CATO?
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